of the aircraft to be used by all branches of the u.s. military for a total estimated cost of $1.5 trillion. o'brien,s is steve vice president for program integration and business development. welcome to the program. let's begin with where you are at. what is the purpose of the demonstration center? guest: it is built to show the difference of the f-35. the capability provided, and the avionics as well as the range. we have simulators of the f-35. it is a way to communicate this quantam leap in ability. host: who are you demonstrating it to? who visits the fighter demonstration center? guest: we have the navy, marine corps, and the air force. we also have eight international partners. we continue to add more partners, more countries to the program. israel and japan have committed we see the airplane. another set of countries buying the program or buying the airplane in the years to come. this allows us to communicate that difference in washington, d.c., to the decision-makers on the program. host: you have visits from members of congress as well. what is the purpose for them to see the center?